big boy, was it the series 4 soft locker, which is the one most people talk about with 4wds, or one of the other ones which are (if i am correct) used for drag racing and are more like spools
http://www.yotatech.com/f31/detroit-loc ... ker-50332/
i have been having a read through here, they guys are talking about the difference bettwen the soft locker and the normal detroits.
also i know from previous history on the 4wd action forum there is a massive thread on the detroit, with some really really good tech, i ws reading it a few years ago when i was dead set on getting one.
basically(this is all as far as i remember) the detroit has come from how it first started through 3 different versions and the fouth is the soft locker, which as fat as i know, is gentle, and very very good, they are a whole class about the lokka, and the lock right, and very different from the previous detroits, i think it has soemthing to do with them taking less force to unlock, so when turning they unlock easyer, and there for shouldnt wear your tyres or break stuff.
the only reason i can see that you would have more tyre wear, is that its to tight, and is acting as a spool(or welded diff) and isnt unlocking,
but in the end, i would also like to put forward, all my thoughts are based on reserch and not actual real world experiance, i would love to have some real world experiance, and if i had the cash i would probably put two soft lockers in my 75,
although i have been thinking about having auto lockers since i first thought about putting alocker in my first 4wd, i have to say considering how far i have gotten off road in my dual single spinnered 75, i am considering air lockers for the reason of being able to try with open diffs first
however, i still like the thought of not having to worry about turning it on, or having an airline to rip out, or have get brittle, and in the end, i can pretty much say i will go the auto route, with a series 4 being the one i want. ( but i will probably be a penny pincher and try the lokka or lockrite first)